Converted callback can only be called for once
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4eac6b31b1
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3 changed files with 32 additions and 25 deletions
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@ -4,23 +4,36 @@
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#include "atom/common/native_mate_converters/callback.h"
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#include "native_mate/wrappable.h"
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namespace mate {
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namespace internal {
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namespace {
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struct TranslaterHolder : public Wrappable {
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struct TranslaterHolder {
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Translater translater;
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};
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// Cached JavaScript version of |CallTranslater|.
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v8::Persistent<v8::FunctionTemplate> g_call_translater;
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void CallTranslater(TranslaterHolder* holder, mate::Arguments* args) {
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void CallTranslater(v8::Local<v8::External> external,
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v8::Local<v8::Object> state,
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mate::Arguments* args) {
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v8::Isolate* isolate = args->isolate();
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// Check if the callback has already been called.
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v8::Local<v8::String> called_symbol = mate::StringToSymbol(isolate, "called");
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if (state->Has(called_symbol)) {
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args->ThrowError("callback can only be called for once");
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return;
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} else {
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state->Set(called_symbol, v8::Boolean::New(isolate, true));
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}
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TranslaterHolder* holder = static_cast<TranslaterHolder*>(external->Value());
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holder->translater.Run(args);
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delete holder;
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}
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// func.bind(func, arg1).
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@ -28,12 +41,13 @@ void CallTranslater(TranslaterHolder* holder, mate::Arguments* args) {
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v8::Local<v8::Value> BindFunctionWith(v8::Isolate* isolate,
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v8::Local<v8::Context> context,
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v8::Local<v8::Function> func,
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v8::Local<v8::Value> arg1) {
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v8::Local<v8::Value> arg1,
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v8::Local<v8::Value> arg2) {
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v8::MaybeLocal<v8::Value> bind = func->Get(mate::StringToV8(isolate, "bind"));
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CHECK(!bind.IsEmpty());
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v8::Local<v8::Function> bind_func =
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v8::Local<v8::Function>::Cast(bind.ToLocalChecked());
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v8::Local<v8::Value> converted[] = { func, arg1 };
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v8::Local<v8::Value> converted[] = { func, arg1, arg2 };
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return bind_func->Call(
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context, func, arraysize(converted), converted).ToLocalChecked();
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}
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@ -55,7 +69,8 @@ v8::Local<v8::Value> CreateFunctionFromTranslater(
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return BindFunctionWith(isolate,
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isolate->GetCurrentContext(),
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call_translater->GetFunction(),
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holder->GetWrapper(isolate));
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v8::External::New(isolate, holder),
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v8::Object::New(isolate));
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}
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} // namespace internal
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